您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 19    No. 6    December 2009

[PDF Download]    [Flash Online]

    

Effect of interface recombination on magnetoelectric coupling in CoFe2O4-BaTiO3 composites
NIE Jun-wu(聂军武), XU Guo-yue(徐国跃), QI Xian-jin(祁先进)

College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics,
Nanjing 211100, China

Abstract:The (1−x)CoFe2O4+xBaTiO3 (x=0.5) magnetoelectric(ME) nano-powders were prepared by molten salt synthesis method and the corresponding ceramics were sintered. The morphology and structure of as-prepared powders and ceramics were characterized and studied systematically by using XRD, SEM and EDX. In particles, the two phases, CoFe2O4 and BaTiO3, are symbiotic with nano-scale coordinate lattice. A considerable ME coefficient(αE) of about 15.96 mV/A is observed in the x=0.5 ME ceramic, which is attributed to the better interface sintered by using those nano-particles with the two phases and a correct poling strategy on the sample. But the interface between the phases has gone through a separating and recombinating during their sintering process. A two-time sintering process was also performed on those ceramics while the αE of the x=0.5 two-time sintered ceramic drops to 67.7 μV/A, which could be explained by the split of the interface during the recombination in the ceramics preparation.

 

Key words: magnetoelectric ceramics; molten salt; magnetic properties; interface

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn